body,
html {
    width: 100vw;
    height: 100vh;
}

abbr,
address,
article,
aside,
b,
blockquote,
body,
cite,
code,
dd,
del,
details,
dfn,
div,
dl,
dt,
em,
figcaption,
footer,
form,
h1,
h2,
h3,
h4,
h5,
h6,
header,
hgroup,
i,
iframe,
ins,
kbd,
label,
mark,
menu,
nav,
object,
ol,
p,
pre,
q,
samp,
section,
small,
span,
strong,
summary,
time,
var {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    vertical-align: baseline;
    background: 0 0;
}